# \[Bug:trunk\] trap(:USR1, "EXIT") doesn't in effect when sysread is interputted

**URL:** <https://www.ruby-forum.com/t/bug-trunk-trap-usr1-exit-doesnt-in-effect-when-sysread-is-interputted/156532>\
**Category:** Development\
**Created:** [December 29, 2008, 5:11pm UTC](https://www.ruby-forum.com/t/bug-trunk-trap-usr1-exit-doesnt-in-effect-when-sysread-is-interputted/156532 "2008-12-29T17:11:27Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [December 29, 2008, 5:11pm UTC](https://www.ruby-forum.com/t/bug-trunk-trap-usr1-exit-doesnt-in-effect-when-sysread-is-interputted/156532/1 "2008-12-29T17:11:27Z")

</div>

e$B0J2\<$N%W%m%0%i%`$N$h$&$K!“e(Btrap e$B$Ge(B USR1 e$B$Ke(B EXIT  
e$B$H@\_Dj$7$F$”$Ce(B  
e$B$?;~!"e(BSIGUSR1 e$B$G3d$j9~$^$l$?;~$Ke(B EINTR  
e$B$K$J$C$F$7$^$$$^$9!#e(B

% ./ruby -ve ’  
r,w = IO.pipe  
pid = fork {  
trap(:USR1, “EXIT”)  
r.sysread(4096)  
}  
sleep 1  
Process.kill(:USR1, pid)  
Process.wait(pid)  
’  
ruby 1.9.1 (2008-12-29 patchlevel-5000 trunk 21182) [i686-linux]  
-e:5:in `sysread': Interrupted system call (Errno::EINTR) from -e:5:in`block in ’  
from -e:3:in `fork' from -e:3:in`’

1.8 e$B$G$O!"e(BEXIT e$B$N;XDj$I$\*$j!“e(BEINTR  
e$B$K$J$k$3$H$J$/!”=\*N;$7$^$9!#e(B

% ruby-1.8 -ve ’  
r,w = IO.pipe  
pid = fork {  
trap(:USR1, “EXIT”)  
r.sysread(4096)  
}  
sleep 1  
Process.kill(:USR1, pid)  
Process.wait(pid)  
’  
ruby 1.8.7 (2008-12-26 revision 21066) [i686-linux]